package string;

public class StringBuilderDemo {
    public static void main(String[] args) {


        StringBuilder builder=new StringBuilder("好好学习Java,");
        builder.append("为了找个好工作");
        System.out.println(builder);

        builder.replace(9,16,"为了改变世界");
        System.out.println(builder);

        builder.delete(0,8);
        System.out.println(builder);

        builder.insert(0,"活着");
        System.out.println(builder);

        builder.reverse();
        System.out.println(builder);

       /* StringBuilder builder1=new StringBuilder();
        StringBuilder builder2=new StringBuilder("abc");

        String str="abc";
        StringBuilder builder3=new StringBuilder(str);
        String str1=builder3.toString();*/
    }
}
